The Canny/Hayes/O'Loughlin/Lafferty record that the Earl's Chair comes from was a very big milestone in Irish music and if I'm not mistaken the first ever LP in the genre.
Interesting listening to those clips of Jackie - hate to say it about one of my heroes but he's got a little less pungent as he has aged. On these clips, and when I've heard him recently, he plays in a much more detached, staccato fashion than he did in the 1970s and early 1980s. It seems more careful, somehow, and although it's still very nice (great job on the Dairymaid - Wensleydale?) I think I like the younger, wilder, stinkier Jackie better.
He's written some great tunes, too, although I'm not convinced the ones on view here are among his best. Doorus Mill is a fine jig, as is the Kanturk Jig, with its D-minor modulation in the second part, and Sweeney's Wheel, a circular kind of reel aptly named after a friend of his who dreamed of inventing a perpetual motion machine. The jigs I mentioned in particular are very good on the C#/D box (surprise, surprise).